19442857853 has 16 divisors (see below), whose sum is σ = 20317132800. Its totient is φ = 18584480640.

The previous prime is 19442857849. The next prime is 19442857877. The reversal of 19442857853 is 35875824491.

It is a cyclic number.

It is not a de Polignac number, because 19442857853 - 2² = 19442857849 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19442853853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3039983 + ... + 3046371.

It is an arithmetic number, because the mean of its divisors is an integer number (1269820800).

Almost surely, 2^19442857853 is an apocalyptic number.

It is an amenable number.

19442857853 is a deficient number, since it is larger than the sum of its proper divisors (874274947).

19442857853 is a wasteful number, since it uses less digits than its factorization.

19442857853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7612.

The product of its digits is 9676800, while the sum is 56.

The spelling of 19442857853 in words is "nineteen billion, four hundred forty-two million, eight hundred fifty-seven thousand, eight hundred fifty-three".